Condensed Consolidated Statements of Operations (USD $) In Millions, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Condensed Consolidated Statements of Operations
Product revenue	$ 650	$ 587	$ 1,144	$ 1,055
Service revenue	662	589	1,263	1,150
Total revenue	1,312	1,176	2,407	2,205
Cost of products	526	463	930	846
Cost of services	516	472	997	927
Selling, general and administrative expenses	181	171	345	341
Research and development expenses	42	39	82	78
Total operating expenses	1,265	1,145	2,354	2,192
Income from operations	47	31	53	13
Interest expense	(1)	0	(1)	(1)
Other (expense) income, net	(1)	0	5	1
Income from continuing operations before income taxes	45	31	57	13
Income tax expense	8	11	9	10
Income from continuing operations	37	20	48	3
Income (loss) from discontinued operations, net of tax	(2)	11	1	11
Net income	35	31	49	14
Net income attributable to noncontrolling interests	2	0	3	2
Net income attributable to NCR	33	31	46	12
Amounts attributable to NCR common stockholders:
Income from continuing operations	35	20	45	1
Income (loss) from discontinued operations, net of tax	(2)	11	1	11
Net income (loss)	$ 33	$ 31	$ 46	$ 12
Income per share attributable to NCR common stockholders:
Basic	$ 0.22	$ 0.12	$ 0.28	$ 0.01
Diluted	$ 0.22	$ 0.12	$ 0.28	$ 0.01
Net income per common share
Basic	$ 0.21	$ 0.19	$ 0.29	$ 0.07
Diluted	$ 0.21	$ 0.19	$ 0.29	$ 0.07
Weighted average common shares outstanding
Basic	157.8	160.4	158.5	160.1
Diluted	160.7	161.6	161.2	161.3